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       1             : #ifndef GREG_DATE_HPP___
       2             : #define GREG_DATE_HPP___
       3             : 
       4             : /* Copyright (c) 2002,2003 CrystalClear Software, Inc.
       5             :  * Use, modification and distribution is subject to the
       6             :  * Boost Software License, Version 1.0. (See accompanying
       7             :  * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
       8             :  * Author: Jeff Garland
       9             :  * $Date$
      10             :  */
      11             : 
      12             : #include <boost/throw_exception.hpp>
      13             : #include <boost/date_time/compiler_config.hpp>
      14             : #include <boost/date_time/date.hpp>
      15             : #include <boost/date_time/special_defs.hpp>
      16             : #include <boost/date_time/gregorian/greg_calendar.hpp>
      17             : #include <boost/date_time/gregorian/greg_duration.hpp>
      18             : 
      19             : namespace boost {
      20             : namespace gregorian {
      21             : 
      22             :   //bring special enum values into the namespace
      23             :   using date_time::special_values;
      24             :   using date_time::not_special;
      25             :   using date_time::neg_infin;
      26             :   using date_time::pos_infin;
      27             :   using date_time::not_a_date_time;
      28             :   using date_time::max_date_time;
      29             :   using date_time::min_date_time;
      30             : 
      31             :   //! A date type based on gregorian_calendar
      32             :   /*! This class is the primary interface for programming with
      33             :       greogorian dates.  The is a lightweight type that can be
      34             :       freely passed by value.  All comparison operators are
      35             :       supported.
      36             :       \ingroup date_basics
      37             :   */
      38             :   class BOOST_SYMBOL_VISIBLE date : public date_time::date<date, gregorian_calendar, date_duration>
      39             :   {
      40             :    public:
      41             :     typedef gregorian_calendar::year_type year_type;
      42             :     typedef gregorian_calendar::month_type month_type;
      43             :     typedef gregorian_calendar::day_type day_type;
      44             :     typedef gregorian_calendar::day_of_year_type day_of_year_type;
      45             :     typedef gregorian_calendar::ymd_type ymd_type;
      46             :     typedef gregorian_calendar::date_rep_type date_rep_type;
      47             :     typedef gregorian_calendar::date_int_type date_int_type;
      48             :     typedef date_duration  duration_type;
      49             : #if !defined(DATE_TIME_NO_DEFAULT_CONSTRUCTOR)
      50             :     //! Default constructor constructs with not_a_date_time
      51             :     date():
      52             :       date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(not_a_date_time))
      53             :     {}
      54             : #endif // DATE_TIME_NO_DEFAULT_CONSTRUCTOR
      55             :     //! Main constructor with year, month, day
      56           0 :     date(year_type y, month_type m, day_type d)
      57           0 :       : date_time::date<date, gregorian_calendar, date_duration>(y, m, d)
      58             :     {
      59           0 :       if (gregorian_calendar::end_of_month_day(y, m) < d) {
      60           0 :         boost::throw_exception(bad_day_of_month(std::string("Day of month is not valid for year")));
      61             :       }
      62           0 :     }
      63             :     //! Constructor from a ymd_type structure
      64           0 :     explicit date(const ymd_type& ymd)
      65           0 :       : date_time::date<date, gregorian_calendar, date_duration>(ymd)
      66             :     {}
      67             :     //! Needed copy constructor
      68             :     explicit date(const date_int_type& rhs):
      69             :       date_time::date<date,gregorian_calendar, date_duration>(rhs)
      70             :     {}
      71             :     //! Needed copy constructor
      72             :     explicit date(date_rep_type rhs):
      73             :       date_time::date<date,gregorian_calendar, date_duration>(rhs)
      74             :     {}
      75             :     //! Constructor for infinities, not a date, max and min date
      76           0 :     explicit date(special_values sv):
      77           0 :       date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(sv))
      78             :     {
      79           0 :       if (sv == min_date_time)
      80             :       {
      81           0 :         *this = date(1400, 1, 1);
      82             :       }
      83           0 :       if (sv == max_date_time)
      84             :       {
      85           0 :         *this = date(9999, 12, 31);
      86             :       }
      87             : 
      88           0 :     }
      89             :     //!Return the Julian Day number for the date.
      90             :     date_int_type julian_day() const
      91             :     {
      92             :       ymd_type ymd = year_month_day();
      93             :       return gregorian_calendar::julian_day_number(ymd);
      94             :     }
      95             :     //!Return the day of year 1..365 or 1..366 (for leap year)
      96           0 :     day_of_year_type day_of_year() const
      97             :     {
      98           0 :       date start_of_year(year(), 1, 1);
      99           0 :       unsigned short doy = static_cast<unsigned short>((*this-start_of_year).days() + 1);
     100           0 :       return day_of_year_type(doy);
     101             :     }
     102             :     //!Return the Modified Julian Day number for the date.
     103             :     date_int_type modjulian_day() const
     104             :     {
     105             :       ymd_type ymd = year_month_day();
     106             :       return gregorian_calendar::modjulian_day_number(ymd);
     107             :     }
     108             :     //!Return the iso 8601 week number 1..53
     109             :     int week_number() const
     110             :     {
     111             :       ymd_type ymd = year_month_day();
     112             :       return gregorian_calendar::week_number(ymd);
     113             :     }
     114             :     //! Return the day number from the calendar
     115           0 :     date_int_type day_number() const
     116             :     {
     117           0 :       return days_;
     118             :     }
     119             :     //! Return the last day of the current month
     120             :     date end_of_month() const
     121             :     {
     122             :       ymd_type ymd = year_month_day();
     123             :       unsigned short eom_day =  gregorian_calendar::end_of_month_day(ymd.year, ymd.month);
     124             :       return date(ymd.year, ymd.month, eom_day);
     125             :     }
     126             : 
     127             :    private:
     128             : 
     129             :   };
     130             : 
     131             : 
     132             : 
     133             : } } //namespace gregorian
     134             : 
     135             : 
     136             : 
     137             : #endif